A method for creating a passive shim location in a gradient coil assembly of a magnetic resonance imaging system includes placing at least one tool in a volume between an inner gradient coil assembly and an outer gradient coil assembly. The tool includes an inner core and an outer sleeve. The inner core is removably housed in the outer sleeve. The volume is then filled with a bonding material. Once the bonding material has cured, the inner core is removed from the outer sleeve. The outer sleeve may also be removed from the volume.